JPH03102971A - High voltage stabilization circuit - Google Patents
High voltage stabilization circuitInfo
- Publication number
- JPH03102971A JPH03102971A JP24020689A JP24020689A JPH03102971A JP H03102971 A JPH03102971 A JP H03102971A JP 24020689 A JP24020689 A JP 24020689A JP 24020689 A JP24020689 A JP 24020689A JP H03102971 A JPH03102971 A JP H03102971A
- Authority
- JP
- Japan
- Prior art keywords
- high voltage
- resistor
- voltage
- variation
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000006641 stabilisation Effects 0.000 title abstract 3
- 238000011105 stabilization Methods 0.000 title abstract 3
- 238000001514 detection method Methods 0.000 claims abstract description 23
- 239000003990 capacitor Substances 0.000 claims abstract description 18
- 230000000087 stabilizing effect Effects 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
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- Details Of Television Scanning (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、陰極線管を用いたテレビジョン受像機，プロ
ジエクションテレビジョン，ディスプレイ等の高圧安定
化回路に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a high voltage stabilizing circuit for television receivers, projection televisions, displays, etc. using cathode ray tubes.
第２図は従来の高圧安定化回路を示す回路図である。 FIG. 2 is a circuit diagram showing a conventional high voltage stabilizing circuit.
第２図において、１は高圧発生回路、２．３は高圧検出
抵抗を構戒する抵抗、４は高圧コンデンサ、６は陰極線
管、７は誤差増幅器、８は基準電源、９は高圧発生回路
１の高圧制御端子、ｌＯは高圧発生回路１の高圧出力端
子、１１は可変抵抗である。In Figure 2, 1 is a high voltage generation circuit, 2.3 is a resistor for detecting a high voltage detection resistor, 4 is a high voltage capacitor, 6 is a cathode ray tube, 7 is an error amplifier, 8 is a reference power supply, and 9 is a high voltage generation circuit 1 , 10 is a high voltage output terminal of the high voltage generating circuit 1, and 11 is a variable resistor.
第２図に示す高圧発生回路１は、高圧出力端子ＩＯより
高圧を発生して、陰極線管６のアノードに供給する。し
かし、この高圧は安定化されていない．また、高圧出力
端子１０とアースとの間には、抵抗２，３により構威さ
れる高圧検出抵抗が設けられ、発生した高圧を検出して
、それに応じた検出電圧Ｖ，を出力する。The high voltage generation circuit 1 shown in FIG. 2 generates high voltage from a high voltage output terminal IO and supplies it to the anode of the cathode ray tube 6. However, this high pressure is not stabilized. Further, a high voltage detection resistor constituted by resistors 2 and 3 is provided between the high voltage output terminal 10 and the ground, detects the generated high voltage, and outputs a detection voltage V in accordance with the generated high voltage.
誤差増幅器７は、その検出電圧Ｖ，を反転入力端子より
入力し、基準電源８からの基準電圧を非反転入力端子よ
り入力して、その両者を比較し、その誤差電圧を増幅し
て出力する。そして、高圧発生回路１は、高圧制御端子
９より誤差増幅器７からの誤差電圧を入力し、その誤差
電圧に応じて高圧を発生する。The error amplifier 7 inputs the detected voltage V, from the inverting input terminal, and inputs the reference voltage from the reference power supply 8 from the non-inverting input terminal, compares the two, and amplifies and outputs the error voltage. . The high voltage generating circuit 1 receives the error voltage from the error amplifier 7 through the high voltage control terminal 9, and generates a high voltage according to the error voltage.
従って、陰極線管６のアノードに供給される高圧に変動
が起きても、以上の様な閉ループ（高圧発生回路１，高
圧検出抵抗，基準電源８．誤差増幅器７等から或る閉ル
ープ）によって、その変動を抑圧するように制御が働く
ため、高圧の安定化が図られる。Therefore, even if the high voltage supplied to the anode of the cathode ray tube 6 fluctuates, the above-mentioned closed loop (a certain closed loop from the high voltage generation circuit 1, high voltage detection resistor, reference power source 8, error amplifier 7, etc.) Since control works to suppress fluctuations, high pressure can be stabilized.
なお、陰極線管６のアノードに供給される高圧（即ち、
アノード電圧）は、可変抵抗１■を可変することによっ
て任意の値に設定することができる。Note that the high pressure supplied to the anode of the cathode ray tube 6 (i.e.,
The anode voltage) can be set to any value by varying the variable resistor 1.
しかしながら、上記した高圧安定化回路では、応答速度
を上げるべくループゲインを上げようとすると、寄生発
振を起こしてしまうため、応答速度をそれほど高く上げ
ることができず、そのため、陰極線管６のアノードに供
給される高圧の変動のうち、周波数の高い変動に対して
は十分応答することができないと言う問題があった。However, in the above-mentioned high voltage stabilizing circuit, if an attempt is made to increase the loop gain to increase the response speed, parasitic oscillation will occur, so the response speed cannot be increased that high. There has been a problem in that it is not possible to adequately respond to high frequency fluctuations among fluctuations in the supplied high voltage.
そこで、従来では、この問題を解決するために、高圧発
生回路１の高圧出力端子１０とアースとの間に高圧コン
デンサ４を付加するようにした。即ち、高圧コンデンサ
４を付加することにより、陰極線管６のアノードに供給
される高圧の変動のうち、上記した制御ループだけでは
応答できないほど周波数の高い変動に対し、その変動を
高圧コンデンサ４で平滑することによって抑圧するよう
にしていた。Conventionally, in order to solve this problem, a high voltage capacitor 4 was added between the high voltage output terminal 10 of the high voltage generating circuit 1 and the ground. That is, by adding the high-voltage capacitor 4, the high-voltage capacitor 4 smooths out fluctuations in the high voltage supplied to the anode of the cathode ray tube 6, which have a frequency that is too high to be responded to by the above-mentioned control loop alone. By doing so, he tried to suppress it.
なお、この種の高圧安定化回路としては、例えば、電子
技術出版株式会社発行 テレビ技術 １９８７ １月号
Ｐ５７に掲載されている。This type of high-voltage stabilizing circuit is published, for example, in Television Technology, January 1987 issue, P57, published by Denshi Gijutsu Publishing Co., Ltd.
上記した従来技術においては、陰極線管６のアノードに
供給される高圧の変動のうち、周波数の高い変動に対し
、その変動を高圧コンデンサ４で平滑することによって
抑圧するようにしていた。In the above-mentioned conventional technology, among the fluctuations in the high voltage supplied to the anode of the cathode ray tube 6, high frequency fluctuations are suppressed by smoothing them with the high voltage capacitor 4.
しかしながら、高圧コンデンサ４によって、陰極線管６
のアノードに供給される高圧だけでなく、高圧検出抵抗
の出力する検出電圧ｖ４も平滑されてしまうため、閉ル
ープで十分に応答できる周波数の変動（即ち、周波数が
それほど高くない変動）であるにも関わらず、閉ループ
によってその変動を十分に抑圧することができないと言
う問題があった。However, due to the high voltage capacitor 4, the cathode ray tube 6
Since not only the high voltage supplied to the anode of the high voltage detection resistor but also the detection voltage v4 output from the high voltage detection resistor is smoothed, even if the frequency fluctuation can be sufficiently responded to in a closed loop (that is, the frequency fluctuation is not very high). However, there was a problem in that the closed loop could not sufficiently suppress the fluctuations.
本発明の目的は、上記した従来技術の問題点を解決し、
陰極線管に供給される高圧の変動のうち、どの様な周波
数の変動に対しても十分抑圧することのできる高圧安定
化回路を提供することにある。The purpose of the present invention is to solve the problems of the prior art described above,
It is an object of the present invention to provide a high voltage stabilizing circuit that can sufficiently suppress any frequency fluctuations among fluctuations in high voltage supplied to a cathode ray tube.
上記した目的を達或するために、本発明では、高圧検出
抵抗と高圧コンデンサの、それぞれ、高圧発生回路の出
力端に接続されていない側の端を、共通の抵抗を介して
アースに接地するようにした。In order to achieve the above object, in the present invention, the ends of the high voltage detection resistor and the high voltage capacitor, which are not connected to the output end of the high voltage generation circuit, are grounded to earth via a common resistor. I did it like that.
本発明では、高圧検出抵抗と高圧コンデンサとを共通の
抵抗を介してアースに接地するため、この共通の抵抗に
は高圧検出抵抗を流れた電流と高圧コンデンサを流れた
電流とが流れる。このため、この共通の抵抗の電圧降下
は、陰極線管のアノードに供給される高圧の変動分のう
ち、周波数の高い変動分も低い変動分も含むことになる
。従って、高圧検出抵抗の出力する検出電圧も、その両
者の変動分を含むことになり、閉ループで応答できる周
波数の変動はすべて、閉ループによって抑圧することが
でき、どの様な周波数の変動に対しても高圧の安定化を
図ることができる。In the present invention, the high-voltage detection resistor and the high-voltage capacitor are grounded via a common resistor, so that the current flowing through the high-voltage detection resistor and the current flowing through the high-voltage capacitor flow through this common resistor. Therefore, the voltage drop across this common resistance includes both high-frequency and low-frequency fluctuations among the fluctuations in the high voltage supplied to the anode of the cathode ray tube. Therefore, the detection voltage output by the high voltage detection resistor will also include the fluctuations in both of them, and all frequency fluctuations that can be responded to in a closed loop can be suppressed by the closed loop. It is also possible to stabilize high pressure.
〔実施例〕 以下、本発明の一実施例を第１図により説明する。〔Example〕 An embodiment of the present invention will be described below with reference to FIG.
第ｌ図において、第２図と同一のものには同一の符号を
付した。その他、５は抵抗である。In FIG. 1, the same parts as in FIG. 2 are given the same reference numerals. In addition, 5 is resistance.
本実施例においては、抵抗２．３から或る高圧検出抵抗
と高圧コンデンサ４とを、それぞれ、共通の抵抗５を介
してアースに接地するようにしている。In this embodiment, a certain high voltage detection resistor and high voltage capacitor 4 from the resistor 2.3 are respectively grounded to earth via a common resistor 5.
即ち、本実施例では、抵抗５を付加しているので、抵抗
３の両端電圧をｖ，、抵抗５の両端電圧をＶ，とすると
、検出電圧ｖ４は、
Ｖ，１ ＝ｖ， ＋ｖｓ
となる。また、抵抗５の抵抗値をＲＳ＋抵抗３を流れる
電流をｔｌ＋高圧コンデンサ４を流れる電流をｉ，とす
ると、■，は、
Ｖｓ ＝ （ｉ＊ ＋ ｉｃ ）ＸＲｓとなるので、ｖ
６は、
Ｖ４ ＝Ｖ３ ＋ １１ ＸＲ５ ＋ ｉｅ．ｘＲｓと
なる。That is, in this embodiment, since the resistor 5 is added, if the voltage across the resistor 3 is v, and the voltage across the resistor 5 is V, the detected voltage v4 is V,1 =v, +vs. . Also, if the resistance value of the resistor 5 is RS + the current flowing through the resistor 3 is tl + the current flowing through the high-voltage capacitor 4 is i, then ■, becomes Vs = (i* + ic)XRs, so v
6 is V4 = V3 + 11 XR5 + ie. It becomes xRs.
ここで、ｉｃは、陰極線管６のアノードに供給される高
圧（即ち、アノード電圧）の変動のうち、周波数の高い
変動が現れた時に流れる電流であるので、ｉｃＸＲ，は
、周波数の高い変動が現れた時に発生する電圧となる。Here, ic is a current that flows when a high frequency fluctuation occurs among fluctuations in the high voltage (i.e., anode voltage) supplied to the anode of the cathode ray tube 6, so icXR, is a current that flows when a high frequency fluctuation occurs. This is the voltage generated when it appears.
つまり、抵抗５を付加することで、検出電圧ｖ４が、陰
極線管６のアノードに供給される高圧の変動分のうち、
周波数の高い変動分も平滑されることなく含むことにな
り、従って、閉ループで応答できる周波数の変動はすべ
て、閉ループによって抑圧することができ、どの様な周
波数の変動に対しても高圧の安定化を図ることができる
。In other words, by adding the resistor 5, the detection voltage v4 is increased by the amount of fluctuation in the high voltage supplied to the anode of the cathode ray tube 6.
High frequency fluctuations are also included without being smoothed. Therefore, all frequency fluctuations that can be responded to in a closed loop can be suppressed by the closed loop, and high pressure can be stabilized against any frequency fluctuations. can be achieved.
なお、抵抗２．３から或る高圧検出抵抗及び高圧コンデ
ンサ４は、通常、フライバックトランスの中に内蔵され
ているが、本実施例において付加される抵抗５も、高圧
検出抵抗及び高圧コンデンサ４と同様、フライバックト
ランスの中に内蔵させることができる。Note that the resistor 2.3, a certain high voltage detection resistor, and the high voltage capacitor 4 are normally built into the flyback transformer, but the resistor 5 added in this embodiment also includes the high voltage detection resistor and the high voltage capacitor 4. Similarly, it can be built into a flyback transformer.
本発明によれば、従来の高圧安定化回路に、抵抗を一点
追加するだけで、陰極線管に供給される高圧の変動のう
ち、どの様な周波数の変動に対しても十分抑圧すること
ができ、高圧の安定化を図ることができる。従って、抵
抗を一点追加するだけで済むので、構威が簡単でしかも
コストが安価となる。According to the present invention, by simply adding one resistor to a conventional high voltage stabilizing circuit, it is possible to sufficiently suppress any frequency fluctuations in the high voltage supplied to the cathode ray tube. , high pressure can be stabilized. Therefore, since it is only necessary to add one resistor, the construction is simple and the cost is low.
第１図は本発明の一実施例を示す回路図、第２図は従来
の高圧安定化回路を示す回路図、である。
符号の説明
１・・・高圧発生回路、２，３．５・・・抵抗、４・・
・高圧コンデンサ、６・・・陰極線管、７・・・誤差増
幅器、８・・・基準電源、１１・・・可変抵抗。
薯 １ 図FIG. 1 is a circuit diagram showing an embodiment of the present invention, and FIG. 2 is a circuit diagram showing a conventional high voltage stabilizing circuit. Explanation of symbols 1... High voltage generation circuit, 2, 3.5... Resistor, 4...
- High voltage capacitor, 6... Cathode ray tube, 7... Error amplifier, 8... Reference power supply, 11... Variable resistor.薯1 fig.
Claims (1)
に供給する高圧発生回路と、その一端が該高圧発生回路
の出力端に接続され、該高圧発生回路の発生した高圧を
検出し、それに応じた検出電圧を出力する高圧検出抵抗
と、その一端が前記高圧発生回路の出力端に接続された
高圧コンデンサと、基準電圧を発生する基準電源と、前
記高圧検出抵抗の出力した検出電圧と前記基準電源の発
生した基準電圧とを比較し、その誤差電圧を増幅して出
力する誤差増幅器と、を具備し、該誤差増幅器の出力し
た誤差電圧に応じて前記高圧発生回路における高圧の発
生を制御して、発生する高圧を安定化させる高圧安定化
回路において、 前記高圧検出抵抗と前記高圧コンデンサの、それぞれ、
前記高圧発生回路の出力端に接続されていない側の他端
を、共通の抵抗を介してアースに接地して成ることを特
徴とする高圧安定化回路。[Claims] 1. A high voltage generation circuit that generates high pressure from its output end and supplies it to the anode of the cathode ray tube; one end of which is connected to the output end of the high voltage generation circuit; a high voltage detection resistor that detects high voltage and outputs a corresponding detection voltage; a high voltage capacitor whose one end is connected to the output terminal of the high voltage generation circuit; a reference power supply that generates a reference voltage; an error amplifier that compares the output detection voltage with a reference voltage generated by the reference power supply and amplifies and outputs the error voltage, and the high voltage generation circuit according to the error voltage output from the error amplifier. In a high voltage stabilizing circuit that controls the generation of high voltage and stabilizes the generated high voltage, each of the high voltage detection resistor and the high voltage capacitor,
A high voltage stabilizing circuit characterized in that the other end of the high voltage generating circuit that is not connected to the output end is grounded to earth via a common resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1240206A JP2644344B2 (en) | 1989-09-18 | 1989-09-18 | High voltage stabilization circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1240206A JP2644344B2 (en) | 1989-09-18 | 1989-09-18 | High voltage stabilization circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03102971A true JPH03102971A (en) | 1991-04-30 |
| JP2644344B2 JP2644344B2 (en) | 1997-08-25 |
Family
ID=17056033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1240206A Expired - Fee Related JP2644344B2 (en) | 1989-09-18 | 1989-09-18 | High voltage stabilization circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2644344B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5965987A (en) * | 1995-11-15 | 1999-10-12 | Nanao Corporation | Apparatus for suppressing electric field radiation from a cathode ray tube |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57151062U (en) * | 1981-03-17 | 1982-09-22 | ||
| JPH01282972A (en) * | 1988-05-09 | 1989-11-14 | Mitsubishi Electric Corp | High voltage stabilizing circuit for television receiver |
-
1989
- 1989-09-18 JP JP1240206A patent/JP2644344B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57151062U (en) * | 1981-03-17 | 1982-09-22 | ||
| JPH01282972A (en) * | 1988-05-09 | 1989-11-14 | Mitsubishi Electric Corp | High voltage stabilizing circuit for television receiver |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5965987A (en) * | 1995-11-15 | 1999-10-12 | Nanao Corporation | Apparatus for suppressing electric field radiation from a cathode ray tube |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2644344B2 (en) | 1997-08-25 |
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